TrendCatch SP compute live Trend Signals (TREND-Change) for S&amp;P500 E-mini.TrendCatch's strength is its ability to correctly compute the signals and inform investors when the market trend changes, based on overall market behavior. TrendCatch differs from other systems in that it does not attempt to predict a future price. Instead, TrendCatch attempts to determine when the current trend changes and if that should lead to a change in position.